Abstract

The wound healing is a complex process which, sometimes, can be a problem in public health because of the possibility of physical disability or even death. Due to the lack of a gold standard drug in skin wound treatment and aiming at the discovery of new treatments in skin repair and the mechanisms involved in the process, we used oleoresin (OR) from Copaifera langsdorffii and hydroalcoholic extract of the leaves (EH) to treat rat skin wounds. For that, male Wistar rats were divided into groups (n = 8): Lanette, Collagenase, 10% EH, or 10% OR and, after anesthesia, one wound of 2 cm was made in the back of animals. The wounds were treated once a day for 3, 7, or 14 days and the wound areas were measured. The rats were euthanized and skin samples destined to biochemical, molecular, and immunohistochemical analysis. The results showed a macroscopic retraction of the wounds of 10% EH and 10% OR creams and both treatments showed anti-inflammatory activity. Molecular and immunohistochemical results demonstrated the activity of Copaifera langsdorffii creams in angiogenesis, reepithelialization, wound retraction, and remodeling mechanisms.

Highlights

  • Since the XVI century, the oleoresin of Copaifera langsdorffii has been used by Brazilian Indians to treat some diseases [2] and the popular knowledge reports the use of the plant as anti-inflammatory and antimicrobial agent and to treat skin wounds [1, 3]

  • There are some works [1, 13,14,15,16,17] which studied the wound healing potential of Copaifera langsdorffii through macroscopic analysis and collagen synthesis mechanisms, but there is the necessity of more researches about the wound healing mechanisms of the Evidence-Based Complementary and Alternative Medicine plant

  • As well as other plants whose wound healing potential derived from popular knowledge has been proved experimentally [29,30,31,32,33], this article proved the effectiveness of Copaifera langsdorffii creams in rat skin wound healing, according to macroscopic retraction of wounds after 14 days, besides the effect of leaves extract and oleoresin in the antiinflammatory activity, boost in reepithelialization, angiogenesis, cell proliferation, and extracellular matrix remodeling

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Summary

Introduction

Since the XVI century, the oleoresin of Copaifera langsdorffii has been used by Brazilian Indians to treat some diseases [2] and the popular knowledge reports the use of the plant as anti-inflammatory and antimicrobial agent and to treat skin wounds [1, 3]. Among the biological properties of copaiba, some have already been studied such as anti-inflammatory agent [4], antinociceptive [5], antioxidant [6], gastrointestinal diseases [6,7,8,9], pulmonary and urinary disorders [10], urolithiasis [11], and analgesic agent [1, 12]. The aromatic and phenolic compounds presented in aerial parts of copaiba are important in cosmetic and pharmaceutical industries [19], besides the use of hydroalcoholic extract from the leaves to treat urolithiasis [11]

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